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| Number | Title | Issue Date |
| 8045062 | Contour free point operation for video skin tone correction A method for color tone correction is disclosed. The method generally includes the steps of (A) generating a plurality of first intermediate components by scaling a plurality of first color components towards a first ideal color, wherein the first color components (... | 10/25/2011 |
| 7821580 | Contour free point operation for video skin tone correction A method for a color tone correction is disclosed. The method generally includes the steps of (A) generating a plurality of first intermediate components by scaling a plurality of first color components towards a first ideal color, wherein the first color components... | 10/26/2010 |
| 7495710 | Display apparatus and method for reproducing color therewith A display apparatus includes a tuner for selecting a desired channel; a decoder for decoding broadcasting signals (Y, U, V) inputted from the selected channel; a video processing unit for processing the decoded broadcasting signals into (R, G, B) signals; a gain adj... | 02/24/2009 |
| 7339619 | Image pickup system and image processing program for performing correction on chroma signal A color signal of a primary color or a color signal of a complementary color is converted from a CCD to signals in a color space having an intensity, a hue and a chroma. Tone conversion is performed on a luminance signal. A chroma correction coefficient is calculate... | 03/04/2008 |
| 7239422 | Color gamut mapping using a cost function A method of generating a reduced color gamut boundary for a color output device using three or more colorants, wherein the amount of each colorant is controlled by a colorant control signal vector, including determining a forward device model for the color output de... | 07/03/2007 |
| 7231085 | Color image signal processing method for correcting hue turn and color image outputting device and imaging device A chromaticity diagram is divided into a plurality of sections by a primary color line and a complementary color line of a color that does not cause hue turn, then it is decided to which section a color signal being output from an imaging device belongs, and then a ... | 06/12/2007 |
| 7176909 | Color correction circuit and image display apparatus including the same A 2.2th-power to 1st-power conversion circuit 102 uses a 2.2th-power curve to convert an input R signal ‘a’ into an R signal ‘b’ expressed in a 1st-power signal space. Offsets, which are to be added to a G signal and a B signal, ... | 02/13/2007 |
| 7133155 | Method and apparatus for modifying a portion of an image in accordance with colorimetric parameters A method and apparatus for modifying images. The method includes the steps of analyzing a digital image file of an image so as to identify at least one predetermined colorimetric parameter; and automatically modifying that portion of said image having said at least ... | 11/07/2006 |
| 7046305 | Method and apparatus for enhancing green contrast of a color video signal Method and apparatus for automatically enhancing the foliage display of a color signal includes providing the color signal in multiplexed form having alternating first and second components, the first component being substantially aligned with a flesh tone color spa... | 05/16/2006 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6903782 | System and method for performing segmentation-based enhancements of a video image There is disclosed an apparatus for performing segmentation-based enhancements of a video image. The apparatus comprises: 1) an input buffer for storing video frames of an incoming video signal; 2) a segmentation controller capable of segmenting a first stored frame... | 06/07/2005 |
| 6888579 | Method and system for tint control for component video signals A method and system are provided for controlling tint of component video signals. The system includes a first input for receiving a first component video signal; a second input for receiving a second component video signal; circuitry including a first differential a... | 05/03/2005 |
| 6876399 | Image sensing apparatus for microscope An image sensing apparatus for a microscope of this invention includes an image sensing unit for sensing an observation image obtained by a microscope and obtaining the observation image, a microscopy technique determination unit for detecting a microscopy technique... | 04/05/2005 |
| 6476820 | Video image display apparatus and method A signal Y outputted from a Y/C separating circuit is supplied to first and second matrices. Signals R-Y and B-Y are supplied to the first matrix through a gain control amplifier (GCA) and are also supplied to the second matrix. The signals Y, R-Y, and B-... | 11/05/2002 |
| 6384837 | Symbol color compensating method for color display system A symbol color compensating method for a color display system includes the steps of detecting colors of a plurality of pixels from an image being displayed, calculating an entire frequency number of flesh tone, blue and green colors from the detected colo... | 05/07/2002 |
| 6343141 | Skin area detection for video image systems An apparatus for detecting skin areas in video sequences is disclosed. The apparatus is configured to include a shape locator and a tone detector. The shape locator analyzes the input video sequences to identify the edges of all the objects in a video fra... | 01/29/2002 |
| 6169536 | Color picture quality compensation circuit and related control method thereof A color picture quality compensation circuit comprising a device for detecting whether a reference color signal is present in a color signal representing a color of a video image; a device for determining a respective one of a plurality of types of refere... | 01/02/2001 |
| 6072526 | Image sensing device that can correct colors corresponding to skin in a video signal An automatic exposure control apparatus comprises a skin color extracting circuit for extracting a skin-colored portion from an input video signal and a focus condition detecting circuit for detecting a focus condition of the skin-colored portion. Exposur... | 06/06/2000 |
| 5999230 | Tone correction apparatus for digital color image signal A tone correction apparatus corrects the tone of an input color image signal independently of each of a plurality of hue areas divided by a plurality of standard axes passing through a plurality of standard colors set on a hue coordinate system. The tone ... | 12/07/1999 |
| 5926617 | Method of determining display characteristic function A test image 40 for determining a gamma value has a plurality of first gradation patterns 20 and a plurality of second gradation patterns 30. The patterns 20 and 30 are arranged alternately in a vertical direction. In each pattern 20, a relative brightnes... | 07/20/1999 |
| 5798801 | Arrangement for providing vivid color in a television signal An arrangement for increasing saturation of colors in a color television signal while maintaining fleshtone colors at a same level, the arrangement including a circuit for detecting color signals in a color television signal, circuitry for discerning fles... | 08/25/1998 |
| 5638136 | Method and apparatus for detecting flesh tones in an image A method and apparatus for adjusting a color difference signal of an image includes a video signal processor. The video signal processor receives a luminance signal and color difference signals representing the image, and accesses a color saturation level... | 06/10/1997 |
| 5585860 | Reproduction circuit for skin color in video signals A skin-color-area detector generates a skin-color-area signal from an input video signal. An average luminance level detector generates an average luminance level signal from a luminance signal. These signals are transmitted to a skin-color-corrector to g... | 12/17/1996 |
| 5583666 | Method for cross-device color calibration and enhancement using explicit constraints This invention provides a method for transforming an input color space to an output color space where each of a plurality of specified colors and/or color regions are constrained to be transformed by any one of a plurality of explicitly specified color ca... | 12/10/1996 |
| 5574513 | Color selection aperture correction circuit A video signal processor controls aperture correction of the video signal by detecting the occurrence of particular colors in the image produced by the video signal. The particular color, for example, fleshtone, is detected as a ratio of the amplitude of ... | 11/12/1996 |
| 5561474 | Superimposing circuit performing superimposing based on a color saturation level determined from color difference signals The color video camera has a processing circuit which converts electrical signals obtained from an imager into a luminance signal and color-difference signals. The color video camera further includes a memory which stores a table of values designating col... | 10/01/1996 |
| 5555031 | Adaptive video signal compression In a video signal processing circuit, an adaptive signal compression is realized by correcting the color saturation by multiplication of color difference signals (R-Y, G-Y) by a same correction factor in such a way that color signal values (R, G, B) remai... | 09/10/1996 |
| 5502508 | Gradation compensating apparatus for a video signal A gradation compensating apparatus comprises a skin color detecting circuit for detecting a skin color signal from an inputted color difference signal, a compensation amount controlling circuit for controlling the signal level by the skin color detecting ... | 03/26/1996 |
| 5488429 | Video signal processor for detecting flesh tones in am image A flesh-tone area is detected based on color-difference and luminance signals constituting video signals, and luminance correction, color correction, and aperture correction are performed only on the flesh-tone area or a human face area identified in the ... | 01/30/1996 |
| 5428402 | Tint detection circuit for automatically selecting a desired tint in a video signal Tint detection circuit for automatically selecting a desired tint in a video signal, including a limit signal generator coupled to receive first (R), second (G) and third (R) color signals in order to generate first and second limit signals (CRITR, CRITB)... | 06/27/1995 |
| 5416533 | Apparatus for correcting a black level of a video signal A pedestal clamping device clamps a pedestal level of an input video signal in response to a predetermined pedestal voltage, and converts the input video signal into a clamped video signal. A black-level expanding device expands a tone of a black portion ... | 05/16/1995 |
| 5384601 | Color adjustment apparatus for automatically changing colors An automatic color adjustment apparatus for use in an imaging device for adjusting the color of a subject such as skin or leave, which is well retained in human memory, to be as natural as possible. The color adjustment apparatus has a weighting coefficie... | 01/24/1995 |
| 5381185 | Method and apparatus for correcting flesh color In a method for correcting flesh color including the steps of generating an I-axis component and Q-axis component of a color-difference signal from R-Y, G-Y, and B-Y color-difference signals; generating a flesh color correction signal on the basis of the ... | 01/10/1995 |
| 5333070 | Apparatus for adjusting hue, chrominance, and luminance of a video signal using matrix circuits Disclosed herein is an apparatus for carrying out color correction on a video signal. The apparatus basically comprises a Y/C separating circuit for separating the video signal into a luminance signal and a color signal, a decoder for decomposing these si... | 07/26/1994 |
| 5255076 | Flesh correction circuit and method of flesh correction The present invention relates to a flesh correction circuit with a simple structure and a small size. A first I-axis demodulation circuit and a first O-axis demodulation circuit demodulate a chrominance signal using a first I-axis reference signal and a f... | 10/19/1993 |
| 5124785 | Color television image processing apparatus and method having color fading reduction function A color television image processing apparatus having a color fading reduction function which compresses the luminance signal and color difference signals with different compression ratios. Color fading can be prevented even for high luminance images color... | 06/23/1992 |
| 4987482 | Image pickup apparatus having exposure control for human subjects An image pickup apparatus for outputting an image pickup signal by forming an image of a subject on an image pickup element through an optical system includes a determining circuit for picking up a plurality of color information signals from the image pic... | 01/22/1991 |
| 4837612 | Automatic hue corrector apparatus and method with a capability to correct wide angle demodulator hue signal distortion created in response to predominantly green hue environments Color distortion created in non-standard decoding matrices is corrected by sensing potential differences between hue representative signals and applying correction potentials representative of these potential differences to color representative signals ex... | 06/06/1989 |
| 4754321 | Integratable color correction circuit A color signal correction circuit matrixes the R-Y and B-Y color difference signals to develop an I axis signal for application to a signal correction circuit. The I axis signal is also supplied to a comparator which feeds a counter, the output of which i... | 06/28/1988 |
| 4694330 | Color correction circuit A color correction circuit is disclosed, which includes three video signal lines for supplying red, green and blue signals, respectively, a first circuit for detecting a white color component, a circuit for applying the red, green and blue signals to the ... | 09/15/1987 |
